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2980709 = 13721757
BaseRepresentation
bin1011010111101101100101
312121102202122
423113231211
51230340314
6143515325
734223054
oct13275545
95542678
102980709
1117564a6
12bb8b45
13804944
1457839b
153dd28e
hex2d7b65

2980709 has 4 divisors (see below), whose sum is σ = 3002604. Its totient is φ = 2958816.

The previous prime is 2980697. The next prime is 2980711. The reversal of 2980709 is 9070892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2316484 + 664225 = 1522^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2980709 - 216 = 2915173 is a prime.

It is a super-2 number, since 2×29807092 = 17769252285362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2980759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10742 + ... + 11015.

It is an arithmetic number, because the mean of its divisors is an integer number (750651).

22980709 is an apocalyptic number.

It is an amenable number.

2980709 is a deficient number, since it is larger than the sum of its proper divisors (21895).

2980709 is a wasteful number, since it uses less digits than its factorization.

2980709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21894.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2980709 is about 1726.4729942863. The cubic root of 2980709 is about 143.9151538500.

The spelling of 2980709 in words is "two million, nine hundred eighty thousand, seven hundred nine".

Divisors: 1 137 21757 2980709